Lastly, the law of the long endurance of allied forms on the same continent, — of marsupials in Australia, of edentata in America, and other such cases, — is intelligible, for within a confined country, the recent and the extinct will naturally be allied by descent.

Lastly, the law of the long endurance of allied forms on the same continent, -- of marsupials in Australia, of edentata in America, and other such cases, -- is intelligible, for within a confined country, the recent and the extinct will naturally be allied by descent.